The convenient storage bag makes piano tuning tools kit set easy to carry.You can tuning supplies as you The piano tuning tools will never be lost. Each tool in the tuning kits has been manually finely modulated and calibrated to that each tool will bring you the best tuning experience.Each wooden is carefully and modulated manually and the tuning fork have a rating of 440 Hz, which will be no errors. Our piano tuning tools can be uesd for the set to the advanced set for piano repair or tuning, for grand or upright pianos, which can solve various piano problems as well. Suitable for tuning beginner and professional tuner,such as piano tuners,piano tuning enthusiasts,piano teachers,individuals with piano and other people who need to use tools to adjust the piano. Colour:Photo Color Material:metal+wood+rubber Package Contents: 1 x Tuning wrench kit Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.